The National Statistical Institute (NSI) has the pleasure to submit to the attention of national and foreign users of statistical information the 77th edition of the ‘Statistical Yearbook of the Republic of Bulgaria’ in printed and electronic format. The issue is published in 2010, which marks 130 years since the establishment of a statistical institution in Bulgaria and 100 years since publishing of the first ‘Statistical Yearbook of the Bulgarian Kingdom’ in 1910.